BUT you should research the piss out of it first. I mistakenly ordered the type with wired transmitter AND receiver the first time. Still worked, but had to run wires to both sides to make it work. You surely want the reflective type- wired on one side, reflector on the other. VERY similar part numbers...

How can a man die better than facing fearful odds, for the ashes of his fathers and the temple of his gods.